Bacharach 300 Instructions Manual

Contents

Bacharach 300 Instructions Manual Manual pdf 65 page image

MODEL 300 COMBUSTION ANALYZERInstruction 24-9223 5-35.2 TOXIC SENSOR REPLACEMENTEquipment Needed (See Section 6 for Part Numbers)• Nutdrivers, 4 mm (5/32"), & 8 mm (5/16") •NO X Sensor, or• CO Sensor, or •SO2 SensorProcedureWARNING!Burn hazard. The carbon monoxide sensor contains corrosivechemicals. DO NOT puncture or take the sensor apart.1. Remove sensor cover per Section 4.1.NOTE: The optional SO 2 and NO X sensors are located directly beneaththe O2 and CO sensors. In order to remove these sensors, their mount-ing bracket must be removed first. This requires removing the two 5/16nuts, see Fig. 4-9.2. Using a 5/32 nutdriver, loosen nuts that secure the wires connected toToxic sensor terminals C, S, and R (Fig. 5-2); then remove the wires.3. Remove the 5/32 nuts that retain the Toxic sensor to its expansionchamber; then remove and discard the old Toxic sensor.4. Before proceeding, ensure that the Toxic sensor’s O-ring and mem-brane are still positioned inside the expansion chamber.5. Remove new Toxic sensor from its shipping container and place it overthe screws that protrude up from the expansion chamber. Whenpositioned properly, the sensor’s three electrical connections should befacing up and toward the front of the analyzer.NOTE: The new CO and SO2 sensors will have a shorting wireconnected between terminals R and S. DO NOT remove this wireuntil instructed to do so in Step 7.6. Use the three nuts removed in Step 3 to secure the sensor to theexpansion chamber. DO NOT overtighten these nuts!